powerpc/powernv: Add explicit fast-reboot support

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Add a way to manually invoke a fast-reboot rather than setting the NVRAM
flag. The idea is to allow userspace to invoke a fast-reboot using the
optional string argument to the reboot() system call, or using the xmon
zr command so we don't need to leave around a persistent changes on
a system to use the feature.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200217024833.30580-2-oohall@gmail.com

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Oliver O'Halloran 2020-02-17 13:48:33 +11:00 • committed by Michael Ellerman

parent 16985f2d25

commit 672e480aa2

2 changed files with 3 additions and 0 deletions

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arch/powerpc/include/asm/opal-api.h

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2

arch/powerpc/platforms/powernv/setup.c

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